Hewitt, 34, began dating Hallisay 15 months ago after reconnecting on The Client List, on which he plays Hewitt's estranged husband. They previously worked together on the short-lived NBC series Love Bites. Prior to that, Hewitt dated her Ghost Whispererco-star Jamie Kennedy after ending her engagement to actor Ross McCall.

Hewitt is reportedly three months along, according to Us Weekly which first reported the news.